Apple today released iTunes 10.4 with support for Lion’s Full-Screen Apps feature. The other major feature of iTunes 10.4 is that it is now a 64-bit Cocoa application.
According to Apple, “you can now use iTunes with OS X Lion’s new Full-Screen App capability, which allows you to use iTunes and other apps without distractions. Navigate between your full-screen apps with a simple gesture.
Note: iTunes is now a 64-bit Cocoa application on OS X Lion and includes a number of important stability and performance improvements. Some iTunes plug-ins may no longer be compatible with this version of iTunes. Please contact the plug-in developer for an updated plug-in compatible with iTunes 10.4.”